package com.qd.system.service.role;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.cdqidi.constant.ConstantDto;
import com.cdqidi.db.BaseService;
import com.cdqidi.dto.CacheKey;
import com.cdqidi.excel.ExcelExport;
import com.cdqidi.excel.util.ExportPage;
import com.cdqidi.exception.ApiException;
import com.cdqidi.util.RedisTemplateUtil;
import com.qd.common.sys.domain.entity.role.RoleDTO;
import com.qd.system.mapper.RoleMapper;
import com.qd.system.model.Role;
import com.qd.system.service.dict.MbUtil;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Optional;

import static java.util.stream.Collectors.toList;

/**
 * @author sjk
 */
@Service
@Slf4j
@RequiredArgsConstructor
public class RoleService extends BaseService<RoleMapper, Role> {

    private static final String PREFIX_ID = "sys_role_roleId_{0}";
    private static final String PREFIX_CODE = "sys_role_roleCode_{0}";
    private final RedisTemplateUtil<Role> redisTemplateUtil;
    private final HttpServletResponse response;

    /**
     * 保存
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public RoleDTO save(RoleDTO dto) {
        checkUnique(dto);
        final Role model = dtoToModel(dto);
        try {
            if (super.save(model)) {
                return modelToDto(model);
            }
            throw new ApiException("添加失败");
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 修改
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public RoleDTO update(RoleDTO dto) {
        checkUnique(dto);
        final Role historyModel = Optional.ofNullable(getById(dto.getRoleId())).orElseThrow(() -> new ApiException("ID不存在,不能更新"));
        final Role model = dtoToModel(dto);
        try {
            if (super.updateById(model)) {
                return modelToDto(model);
            }
            throw new ApiException("更新失败");
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
            model.freeData();
        }
    }

    /**
     * 批量添加
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void saveBatch(List<Role> mList) throws ApiException {
        try {
            if (!super.saveBatch(mList)) {
                throw new ApiException("批量添加失败");
            }
        } finally {
            clearCaches(mList);
        }
    }

    /**
     * 批量更新
     *
     * @param mList 数据库对象
     */
    @Transactional(rollbackFor = Exception.class)
    public void updateBatchIds(List<Role> mList) {
        final List<String> ids = mList.stream().map(Role::getRoleId).collect(toList());
        List<Role> historyModelList = checkIds(ids);
        try {

            if (!super.updateBatchById(mList)) {
                throw new ApiException("批量更新失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
            ids.clear();
        }

    }

    /**
     * 删除，单个
     *
     * @param roleId 主键
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeById(String roleId) {
        final Role model = Optional.ofNullable(getById(roleId)).orElseThrow(() -> new ApiException("数据不存在,不能删除"));
        try {
            if (!super.removeById(roleId)) {
                throw new ApiException("删除失败");
            }
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 批量删除
     *
     * @param ids 主键集合
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeBatchIds(List<String> ids) {
        List<Role> historyModelList = checkIds(ids);
        try {
            if (!super.removeByIds(ids)) {
                throw new ApiException("批量删除失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
        }

    }

    /**
     * 根据传入对象构建查询参数，判断是否存在
     *
     * @param dto 参数
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExists(RoleDTO dto) {
        final QueryWrapper<Role> queryWrapper = createQueryWrapper(dto);
        final boolean exists = super.count(queryWrapper) > 0;
        queryWrapper.clear();
        return exists;
    }

    /**
     * 根据主键判断数据是否存在
     *
     * @param roleId 主键
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExistsById(String roleId) {
        boolean exists = false;
        if (StringUtils.hasLength(roleId)) {
            final Role model = getById(roleId);
            exists = (null != model);
            if (exists) {
                model.freeData();
            }
        }
        return exists;
    }

    /**
     * 根据主键获取数据
     *
     * @param roleId 主键
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public Role getById(String roleId) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, roleId);
        return redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getById(roleId), Role.class);
    }

    /**
     * 根据主键获取数据
     *
     * @param roleId 主键
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public RoleDTO getByIdDto(String roleId) {
        final Role model = getById(roleId);
        if (null != model) {
            return modelToDto(model);
        }
        return null;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public Role getOne(RoleDTO dto) {
        final QueryWrapper<Role> queryWrapper = createQueryWrapper(dto);
        final Role model = super.getOne(queryWrapper);
        queryWrapper.clear();
        return model;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public RoleDTO getOneDto(RoleDTO dto) {
        final Role model = getOne(dto);
        if (null == model) {
            return null;
        }
        final RoleDTO newDto = modelToDto(model);
        model.freeData();
        return newDto;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据
     */
    @Transactional(readOnly = true)
    public List<Role> getList(RoleDTO dto) {
        final QueryWrapper<Role> queryWrapper = createQueryWrapper(dto);
        final List<Role> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据，转换成页面对象
     */
    @Transactional(readOnly = true)
    public List<RoleDTO> getListDto(RoleDTO dto) {
        final QueryWrapper<Role> queryWrapper = createQueryWrapper(dto, "rol.");
        final List<RoleDTO> list = baseMapper.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 分页数据
     *
     * @param page 分页对象
     * @param dto  查询参数
     * @return 分页信息
     */
    @Transactional(readOnly = true)
    public IPage<RoleDTO> page(Page<Role> page, RoleDTO dto) {
        final QueryWrapper<Role> queryWrapper = createQueryWrapper(dto, "rol.");
        final IPage<RoleDTO> iPage = baseMapper.page(page, queryWrapper);
        queryWrapper.clear();
        return iPage;
    }

    /**
     * 导出Excel
     *
     * @param query 查询条件
     */
    @Transactional(readOnly = true)
    public void export(RoleDTO query) {
        final ExportPage<Role, RoleDTO> exportPage = new ExportPage<>();
        try {
            final List<RoleDTO> list = exportPage.getAllForPage(page -> page(page, query).getRecords());
            try {
                ExcelExport.downloadExcel(response, RoleDTO.class, () -> list);
            } catch (IOException e) {
                log.error("导出失败", e);
                throw new ApiException("导出失败");
            }
        } finally {
            exportPage.freeData();
        }
    }

    /**
     * 根据唯一性索引获得数据
     * <p>
     * param roleCode
     *
     * @return 单条数据
     */
    @Transactional(readOnly = true)
    public Role getUniqueByRoleCode(String roleCode) {
        final QueryWrapper<Role> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("role_code", roleCode);
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_CODE, roleCode);
        final Role model = redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getOne(queryWrapper, false), Role.class);
        queryWrapper.clear();
        return model;
    }

    /**
     * 验证唯一性索引
     *
     * @param dto 页面对象
     */
    @Transactional(readOnly = true)
    public void checkUnique(RoleDTO dto) {
        final Role model = getUniqueByRoleCode(dto.getRoleCode());
        if (null != model) {
            checkUnique(dto, model);
        }
    }

    /**
     * 验证唯一性索引
     *
     * @param dto   页面对象
     * @param model 根据约束字段查询出来的数据库对象
     */
    private void checkUnique(RoleDTO dto, Role model) {
        if (!StringUtils.hasLength(dto.getRoleId())) {
            throw new ApiException("数据已存在，请勿重复添加");
        }
        if (!dto.getRoleId().equals(model.getRoleId())) {
            throw new ApiException("数据已存在，请勿重复添加");
        }
    }

    /**
     * 清空缓存
     *
     * @param model 数据库对象
     */
    public void clearCache(Role model) {
        if (null == model) {
            return;
        }
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getRoleId()));
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_CODE, model.getRoleCode()));
    }

    /**
     * 清空缓存，批量
     *
     * @param list 缓存对象
     */
    public void clearCaches(List<Role> list) {
        if (null == list || list.isEmpty()) {
            return;
        }
        List<String> ids = list.stream().map(role -> RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, role.getRoleId())).collect(toList());
        if (!ids.isEmpty()) {
            redisTemplateUtil.deleteByKey(ids);
            ids.clear();
        }
        List<String> roleCodeList = list.stream().map(role -> RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, role.getRoleCode())).collect(toList());
        if (!roleCodeList.isEmpty()) {
            redisTemplateUtil.deleteByKey(roleCodeList);
            roleCodeList.clear();
        }
    }

    /**
     * 数据库对象转页面对象
     *
     * @param model 数据库对象
     * @return 页面对象
     */
    public RoleDTO modelToDto(Role model) {
        if (null == model) {
            return null;
        }
        final RoleDTO dto = new RoleDTO();
        dto.setRoleId(model.getRoleId());
        dto.setRoleParentId(model.getRoleParentId());
        dto.setRoleCode(model.getRoleCode());
        dto.setRoleName(model.getRoleName());
        dto.setRoleSort(model.getRoleSort());
        dto.setRoleStatus(model.getRoleStatus());
        dto.setAddTime(model.getAddTime());
        dto.setUpdateTime(model.getUpdateTime());
        dto.setRemark(model.getRemark());
        dto.setDataScope(model.getDataScope());
        buildDisplay(dto);
        return dto;
    }

    /**
     * 页面对象转数据库对象
     *
     * @param dto 页面对象
     * @return 数据库对象
     */
    public Role dtoToModel(RoleDTO dto) {
        if (null == dto) {
            return null;
        }
        final Role model = new Role();
        model.setRoleId(dto.getRoleId());
        model.setRoleParentId(dto.getRoleParentId());
        model.setRoleCode(dto.getRoleCode());
        model.setRoleName(dto.getRoleName());
        model.setRoleSort(dto.getRoleSort());
        model.setRoleStatus(dto.getRoleStatus());
        model.setAddTime(dto.getAddTime());
        model.setUpdateTime(dto.getUpdateTime());
        model.setRemark(dto.getRemark());
        model.setDataScope(dto.getDataScope());
        return model;
    }

    /**
     * 码表转换
     *
     * @param dto 页面对象
     */
    public void buildDisplay(RoleDTO dto) {
        dto.setRoleStatusDisplay(MbUtil.idToDisplay(dto.getRoleStatus()));
        dto.setDataScopeDisplay(MbUtil.idToDisplay(dto.getDataScope()));
    }

    /**
     * 数据库对象转页面对象
     *
     * @param list 数据库对象
     * @return 页面对象
     */
    public List<RoleDTO> modelToDtoList(List<Role> list) {
        if (null == list) {
            return Collections.emptyList();
        }
        return list.stream().map(this::modelToDto).collect(toList());
    }

    /**
     * 页面对象转数据库对象
     *
     * @param list 页面对象
     * @return 数据库对象
     */
    public List<Role> dtoToModelList(List<RoleDTO> list) {
        if (null == list) {
            return Collections.emptyList();
        }
        return list.stream().map(this::dtoToModel).collect(toList());
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto 查询参数，不为空的属性会被自动加入
     */
    public QueryWrapper<Role> createQueryWrapper(RoleDTO dto) {
        return createQueryWrapper(dto, "");
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto        查询参数，不为空的属性会被自动加入
     * @param tableAlias 表别名
     */
    public QueryWrapper<Role> createQueryWrapper(RoleDTO dto, String tableAlias) {
        final QueryWrapper<Role> queryWrapper = new QueryWrapper<>();
        if (null != dto) {
            if (StringUtils.hasLength(tableAlias) && tableAlias.charAt(tableAlias.length() - 1) != '.') {
                tableAlias += ".";
            }
            if (StringUtils.hasLength(dto.getRoleCode())) {
                queryWrapper.eq(tableAlias + "role_code", dto.getRoleCode());
            }
            if (StringUtils.hasLength(dto.getRoleName())) {
                queryWrapper.like(tableAlias + "role_name", dto.getRoleName());
            }
            if (StringUtils.hasLength(dto.getDataScope())) {
                queryWrapper.eq(tableAlias + "data_scope", dto.getDataScope());
            }
            if (StringUtils.hasLength(dto.getRoleParentId())) {
                queryWrapper.eq(tableAlias + "role_parent_id", dto.getRoleParentId());
            }
            if (null != dto.getRoleStatus()) {
                queryWrapper.eq(tableAlias + "role_status", dto.getRoleStatus());
            }
            if (StringUtils.hasLength(dto.getBeginTime())) {
                queryWrapper.apply("date_format(" + tableAlias + "add_time,'%Y-%m-%d') >= {0}", dto.getBeginTime());
            }
            if (StringUtils.hasLength(dto.getEndTime())) {
                queryWrapper.apply("date_format(" + tableAlias + "add_time,'%Y-%m-%d') <= {0}", dto.getEndTime());
            }
        }
        queryWrapper.orderByAsc(tableAlias + "role_parent_id");
        queryWrapper.orderByAsc(tableAlias + "role_sort");
        return queryWrapper;
    }

    /**
     * 批量检查主键在数据库中是否存在
     *
     * @param ids 主键集合
     * @return 主键查询出来的集合
     */
    public List<Role> checkIds(List<String> ids) {
        if (null == ids || ids.isEmpty()) {
            throw new ApiException("ids不能为空");
        }
        final List<Role> list = super.listByIds(ids);
        if (list.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(ids.toArray()));
        }
        if (ids.size() == list.size()) {
            return list;
        }
        List<String> dbIds = list.stream().map(Role::getRoleId).collect(toList());
        final List<String> notExistsList = ids.stream().filter(id -> !dbIds.contains(id)).collect(toList());
        dbIds.clear();
        if (!notExistsList.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(notExistsList.toArray()));
        }
        return list;
    }

    /**
     * 获得角色名字
     *
     * @param roleId 角色ID
     * @return 角色名字
     */
    @Transactional(readOnly = true)
    public String idToDisplay(String roleId) {
        String display = "";
        if (StringUtils.hasLength(roleId)) {
            final Role role = getById(roleId);
            display = (null == role ? "" : role.getRoleName());
        }
        return display;
    }

    /**
     * 检查角色ID是否存在
     *
     * @param roleId 角色ID
     */
    @Transactional(readOnly = true)
    public void checkRole(String roleId) {
        if (StringUtils.hasLength(roleId)) {
            final Role role = getById(roleId);
            if (null == role) {
                throw new ApiException("角色ID不存在[" + roleId + "]");
            }
            role.freeData();
        }
    }
}